12227431 has 6 divisors (see below), whose sum is σ = 12905232. Its totient is φ = 11583540.

The previous prime is 12227429. The next prime is 12227441. The reversal of 12227431 is 13472221.

12227431 = T₅₈ + T₅₉ + ... + T₄₁₈.

It is not a de Polignac number, because 12227431 - 2¹ = 12227429 is a prime.

It is a super-2 number, since 2×12227431² = 299020137719522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12227441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16575 + ... + 17296.

It is an arithmetic number, because the mean of its divisors is an integer number (2150872).

Almost surely, 2^12227431 is an apocalyptic number.

12227431 is a deficient number, since it is larger than the sum of its proper divisors (677801).

12227431 is an equidigital number, since it uses as much as digits as its factorization.

12227431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33909 (or 33890 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 12227431 is about 3496.7743707594. The cubic root of 12227431 is about 230.3801589520.

Adding to 12227431 its reverse (13472221), we get a palindrome (25699652).

The spelling of 12227431 in words is "twelve million, two hundred twenty-seven thousand, four hundred thirty-one".